And if one could be born poly, and that means they are unable to prevent who they fall in love with, wouldn't any restriction on how many be unrealistic?

Love might be infinite but there's only 24 hrs in a day and for my own emotional, mental, physical, and spiritual health -- spreading self thin is not something I want to do. Of course there's restrictions on what is realistic.

It's the polysaturation point in the polymath.

Feelings are just feelings. Even love. You can let it just blow on through. You don't choose how to feel or when to feel. You just feel it. What you CAN choose is how to behave -- REACT or ACT WITH INTENTION in response to those feelings. And anyone can choose "No!"